This standard provides a simple HTTP interface for requesting geo-registered map images from one or more distributed geospatial databases. A WMS request defines the geographic layer(s) and area of interest to be processed. The response to the request is one or more geo-registered map images (returned as JPEG, PNG, etc) that can be displayed in a browser application.
Request For Comment (RFC)
OGC Seeks Public Comment on Candidate OGC SensorThings API Extension: WebSub Asynchronous Messaging Standard